#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>

int a;
int main(int argc, char **argv)
{
    if(argc != 2){
        printf("Usage: %s <number>\n", argv[0]);
        return -1;
    }
    a = strtol(argv[1], NULL, 0);
    printf("a's address = 0x%lx, a's value = %d\n",(long unsigned int)&a, a);
    while(1){
        sleep(10);
    }
    return 0;
}
